Dough mixing machine



Aug. 30, 1932.

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N www y WALTER r. DEHuFnoF GLENno'cmaPENNsYLvANm if The invention' forming the subject matter of this application relates to dough mixingV machines of the power type, andis an improvement over the machine covered yby my United StatesPatent No. 1,656,665, January 17,1928. u ,i f

In common with the aforesaid patented invention, the present invention is designed to effect a very powerful rotary and planetary l@ movement of a dough beater by a substantially direct drive, through, suitable reduction Y gearing, from a variable speed motor mechanism.

The main obj ect of the present invention is to simplify the mechanism describedin the aforesaid patent,and to substitute for the eX- pensive internal wormgearing thereof the more cheaply manufactured and easily assembled spur gearing without in any way reducing the power transmitted by the internal gearing disclosed in the said patent.

Other objects of the invention will become .apparent as the detailed description thereof proceeds;

In Vthe drawing, the single figure illustrates a sectional elevation of a mixing machine showing the improved beater drive mechanism in vertical section.

As shown in the drawing, the mixing machine comprises a base 1 having a standard 2 ext-ending upwardly from one end thereof, and terminating at its upper end in a casing 3 having variable speed mechanism arranged therein, as illustrated in my U. S. Patent No. 1,781,321, November 11, 1980, and operated by a handle 4.- adapted to lock said mechanism in any desired position of variable speed adj ustment. The details of this variable speed drive are not described herein since they form no part of the present invention. It will be understood however that the handle 4 may be adjusted angularly on the casing 3 to vary the speed of rotation of the drive shaft 5.

The drive shaft 5 has a beveled gear 6 suitf.- ably secured to the end thereof; and this gear 6 meshes with a similar bevel gear 7 suitably secured on the upper end of a shaft 8 which is journaled in a bearing 9 formed integral with the standard 2 and depending from a horizontal extension 10 Vof said standard.

ingly rabbetedlower edge ofthe casing 3.

The formation?'ofl the bearing 9`integ-ra1 withthve'extension 10and standard 2 provides a very rigid bearing forV the shaft 8 and greatly reduces the vibration'of the shaftu as `com" f pared with-the vibrationofthe similar shaft shown inPatentNoL1,656,665.i`

Y The shaft 8* isl mounted on suitable-ball bearings in' the yb'e'aring79 and `at its" lower end is provided withua pinion 12Qm'eshing with a pinion 13 securedy to a small counter shaft 14, journaled lat its upper andlow'er ends in a bridge member 15 extending'in wardly-from a gear casing'l andin vaplfate 17 detachably connected Atothe 'lower end-'of thegear 'casing 16 vas by bolts V18. 1 I The upper end of thebearing 9'has alarge internalllgeanr 19 fixed thereto Vby `means" of screws 20"and segmental plates 21 :which vseat in a suitable groove 22 formed in the periph?l ery ofithe v-bearing 9, -said segmental plates b'einlgsecured tothe main body of the internalgear 19 by means of the screws23. "A

bally bearing 24l surrounds a flange25 of the said internal gear 19 and "servesto :support rotatably a planetary geai` c'asing26 from which thev lower gear Acasing A16 is suspended, and to w ich the 'gearecasing 16 isfconn'ect'ed by bolts or screws 27.` v

Formed integral with the pinion `13 and rotatably mounted on the shaft 141s afsecond pinion -28 which meshes with alar'ge `spur gear 29 lkeyed to thebeater spindle shaft 30.'I This shaft 30 is rotatably fmounted at its lower endv 'in afsuitable ball bearingr 31, one of the elements of which is suitably secured to theclosure plate 17 `and the otherelement of which is secured to a hub 32 of a coupling 33 for detachably connecting the beater 34 to the spindle'shaft 30.V jifu. The upper part of the beater spindle 30is journaled in av ball bearing 35 secured tothe bridge v1 5 and extends upwardly beyond said v bridge to. be supported by a4 ball bearingV 36 secured to an upwardly and inwardly 'pro-4 jecting extension 37 formed onsaid bridge 15g-J A pinion 38 is flxedto the upper end of eei the beater spindle and meshes with the internal gear teeth 39 formed on the internal Y gear cup 19.

In operationof the machine it will be evident that rotation of lthe shaft 5 will cause rotation of the shaft Sto rotate the pinion 12, and through; .pinions 13 and 28 will rotate the large square gear 29 which keyed to the beater spindle. 30. It is evident that this gearing forms a reduction gear for rotating the beater 34 about the'aXisofthespindl.30;'

The mixing bowl 39 is of such size that when properly located, as by the key 49,*on'the-- base 1, its axis is coincident with the axisof the driving shaft 8. The beater spindle "30r is offsety frointhi's common axis 41 ofthe shaft -8 and bowl 39Y a suitable distance*V to cause a planetary rotation of the ybeater'i around the axis 41in thebowl 3911s well as' the rotationef the beater` about. its own. axis.

VIt-is evident .that therotation ofthe beater about itsy own axis in the'ixed bowl 39 would cause aplanetary rotation of thel said beater aboutthe'axis 415 In order to ensureaposi- Y tive planetary .rotation of thesaid beater, the spi'ndllefSO is providedlwith the pinion 38 in mesh' with; the teeth 39- of theinternal gear cup19..

' i It twill be' evidentfrom inspection of the drawing that if the beater 34 be rotated clockwise,jlooking downwardly, its planetary ,ro-v tation about the axis 4l will be anti-clockwise ;v and this planetary rotation will vary inspeed pendedhereto or which may be allowed in this application.

What I claim is:

In a vmixing machine, a standard `having a head extending laterally therefrom, a bearing extending downwardly from vsaid head,

`adriveshaft j ournaled insaid. bearing and havixiga lpiniony secured to the lower end` thereof, a casing rotatably mounted on the 'upper end" of said bearing, a beater spindle rotatablyniountedfin;said,casing parallel to Y said shaft, a spur gear secured to the lowerend of 'saidspindlm an internal gear fixed to saidbearing and enclosing the upper end of said spindle,'a pinion on the upper end of said Aspindle meshing `with. thet-eeth, .of said internal gear,- a second shaft journaled in Vsaid casing parallel tothe irstnamedshafnand gears -on said second 'shaft connecting the first named. pinion operably to'said. spur gear, and means'fo'r'rotating said drive shaft..f

In testimony whereof I aiiix my signature.

-, WALTER F; DEIIUFF in accordance withthe offset between -thefaxis v 4l Vand the-axis of `the beater spindle yand depending yupon the offset distance ofthe drive-andbeater spindles and the densityrof the material beingmixed.z

Itwill beevidentffrom. inspection offtheV Y drawing also that the spur-'gearing mounted inthe easingzl can be much more cheaply manufactured-than the? internal gearing-sof the machine-fshown in my Patent N ox 1,656,-y

fr 665iand that the several pinions inthe said-v casing l16 can .be readily replaced fbyothers of vdifferent diameters inl order to varythe gear ratio in the drive betweenzthe driving shaft and.; beater Spindle. Y 1' VVhile-fI'have described the present ma-l chine as Ydesigned :Eormixing dough, 1it must be understood that it is not tobeconsidered-v as-in any Way limited to any partieularuse nor in any other way exceptlas may be im;Y poseditherein by theseope ofk the claim ap. 

